Glow in the Dark  POLY GLOW 50% PBT (Polybutylene terephthalate), 50% PP (Polypropylene) is a phosphorescent embroidery thread that stores UV and artificial light, making embroideries and seams glow in the dark, perfect for extraordinary effects on sports and leisurewear, bags and Trick or Treat bags; the thread unfolds its beautiful, green luminosity. 

Spools contain 100m (109yds). We recommend size 80/12 machine needles, usually Embroidery or Universal. The thread is very suitable for standard embroidery and sewing machines, but we recommend reducing machine speed and thread tension if necessary. The intensity of luminosity depends on the duration of exposure to light.